Gripe water. Do NOT mix it in their bottle they can just take it straight. Skin to skin, body massage, massage their feet especially, their faces they like gently massaged just rock then and very gently trace your fingers along their face. Create a warm and calm bedtime routine. Bath, bottle, burp, massage swaddle, and rock. Zarbees makes a calming bedtime spray for their bed. Maybe you can find that on google.
Make sure she is burped well too could be s mix of gas check formula too and or milk allergy
Hey have you tried taking him to a chiropractor check this video out: https://vm.tiktok.com/ZGd83nXCo/
My daughter was a very colicky baby, her witching hour was from like 10 pm -12am. Walks while carrying her on her belly on my forearm worked the best